]]>https://blog.jartweb.net/?feed=rss2&p=5090050902018 walking season startshttps://blog.jartweb.net/?p=4982
https://blog.jartweb.net/?p=4982#respondSun, 24 Jun 2018 11:08:15 +0000https://blog.jartweb.net/?p=4982And we’re off – starting the 2018 walking season just as Royal Ascot comes to an end.

It is a tedious process going through a full install AND documenting it in detail at the same time!

Anyway I did it, and I also encountered the issue of non-updating Cacti graphs. After a bit of fiddling around, I managed to get them working. Not sure exactly what step of the debugging was responsible, but the various steps were all recorded. So if you follow these instructions:

you should be able to get to the point I have here – a working Pi reading and graphing the temperature and humidity data. I also include details of installing the LCD driver script and the code for the pressure sensor, but these are optional.

If you still struggle to get it to work and can withstand a 1.2 GB download, I have placed a ZIPped copy of the SD card image on OneDrive:

Well, it has proved to be quite popular at work (several laboratories now use them to log temperature and humidity values for around £100 each device) so I wrote up pretty much all the instructions on how to build one (including the necessary software installation and case details).

Here is a diagram of the stripboard layout (and here is the Fritzing file for it). Note this is shown with the copper tracks uppermost whereas in reality they are underneath the board).

Enjoy!

Work on these loggers was mostly in my own time, but additional inspiration and funding came from the EMRP project ‘LUMINAR‘. The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union.